1881J ^'^^ [Chase. 



at the centre of nucleation, -L- = velocity of light. The acceleration of 



sun spots near the solar equator indicates a velocity which is partly rota- 

 tional and partly orbital. The solar corona is now generally attributed to 

 nebulous or meteoric matter, which is constantl3' tending either to fall into or 

 to revolve about the Sun. If Sun's surface is the locus of the mean orbital 



Q 



collisions, the mean nebulous radius is — 1\, and the mean locus of the 

 nebulous particles, ?•„, is 'V "o'^o- Let ta be the time of half-rotation for 



7'. in the fundamental equation „ t ^= », ; then ^ ==: |/365.2565 = 



19.11168 dy, is a mean proportional between the solar terrestrial day and 

 the terrestrial year. This gives for t^, or the photodynamic modulus time 



2 

 at Sun's surface, 7; t = 13.741128 dy. Let n = the number of solar radii 



(?■(,) in Earth's semi-axis major (/>,), and we have the equations : 



«^ = g^t^ = 13.741123 X 86400^ =z n r^ -i- 497.837 



/ 71'' V 3— V \ 



' = ( -I- ^ " ° ) = nh\^ -r- (5032636)^ Hence 

 V 31558150 / ° ^ ^ 



n — 314.551G. 



^o = .0000003915ro. 



2^ JT^ — 10041.8 sec. 

 ' ffo 



2^ -x/^^ = 5073.6 sec. 



(?n / 5073.6 \''_ 1 



dg "~ \10041. 8/ ~ 3.9174 ~ •^^^^'^• 

 To = 93,813,000 -^ 214.5116 = 432580 m. 



— =^^ = 27.8657. 



ffs 1'?fli 



— » = ( -^ ) X / = 332,500. 



Another evidence of the limitation of the time of rotation, at the centre 

 of condensation, by photodynamic influences, is found in the accelerations 

 which are due to condensation within the pi-esent limits of the solar sys- 

 tem. The central actions and reactions of acceleration between Sun and 



Earth vary as their respective masses, because g QC ~ and d is the same. 



d'^ 



In condensing nebulfe, equality o^vis vwa requires that t (of rotation) CX: 

 r". From this source, therefore. Earth has been accelerated (30.034)^ 

 times by its "subsidence " from Neptune's mean orbital distance. This 

 acceleration provides only for synchronous solar and terrestrial rotation ; 

 there has, however, been a further acceleration of 366.2565, by the shorten- 

 ing of the solar year to the terrestrial day, and of |/ 1.0145 by the mean 



